DE10253017B4 - Method for operating a dishwasher with a central control unit - Google Patents

Method for operating a dishwasher with a central control unit

Info

Publication number
DE10253017B4
DE10253017B4 DE10253017A DE10253017A DE10253017B4 DE 10253017 B4 DE10253017 B4 DE 10253017B4 DE 10253017 A DE10253017 A DE 10253017A DE 10253017 A DE10253017 A DE 10253017A DE 10253017 B4 DE10253017 B4 DE 10253017B4
Authority
DE
Germany
Prior art keywords
turbidity
program
values
solubility
control unit
Prior art date
Legal status (The legal status is an assumption and is not a legal conclusion. Google has not performed a legal analysis and makes no representation as to the accuracy of the status listed.)
Expired - Fee Related
Application number
DE10253017A
Other languages
German (de)
Other versions
DE10253017A1 (en
Inventor
Reinhold Baltes
Clemens Jung
Konrad Petry
Peter Schwarzweller
Current Assignee (The listed assignees may be inaccurate. Google has not performed a legal analysis and makes no representation or warranty as to the accuracy of the list.)
Whirlpool Corp
Original Assignee
Whirlpool Corp
Priority date (The priority date is an assumption and is not a legal conclusion. Google has not performed a legal analysis and makes no representation as to the accuracy of the date listed.)
Filing date
Publication date
Application filed by Whirlpool Corp filed Critical Whirlpool Corp
Priority to DE10253017A priority Critical patent/DE10253017B4/en
Priority claimed from DE60311061T external-priority patent/DE60311061T2/en
Publication of DE10253017A1 publication Critical patent/DE10253017A1/en
Application granted granted Critical
Publication of DE10253017B4 publication Critical patent/DE10253017B4/en
Expired - Fee Related legal-status Critical Current
Anticipated expiration legal-status Critical

Links

Classifications

    • GPHYSICS
    • G05CONTROLLING; REGULATING
    • G05BCONTROL OR REGULATING SYSTEMS IN GENERAL; FUNCTIONAL ELEMENTS OF SUCH SYSTEMS; MONITORING OR TESTING ARRANGEMENTS FOR SUCH SYSTEMS OR ELEMENTS
    • G05B13/00Adaptive control systems, i.e. systems automatically adjusting themselves to have a performance which is optimum according to some preassigned criterion
    • G05B13/02Adaptive control systems, i.e. systems automatically adjusting themselves to have a performance which is optimum according to some preassigned criterion electric
    • G05B13/0265Adaptive control systems, i.e. systems automatically adjusting themselves to have a performance which is optimum according to some preassigned criterion electric the criterion being a learning criterion
    • G05B13/0275Adaptive control systems, i.e. systems automatically adjusting themselves to have a performance which is optimum according to some preassigned criterion electric the criterion being a learning criterion using fuzzy logic only
    • AHUMAN NECESSITIES
    • A47FURNITURE; DOMESTIC ARTICLES OR APPLIANCES; COFFEE MILLS; SPICE MILLS; SUCTION CLEANERS IN GENERAL
    • A47LDOMESTIC WASHING OR CLEANING; SUCTION CLEANERS IN GENERAL
    • A47L15/00Washing or rinsing machines for crockery or tableware
    • A47L15/0018Controlling processes, i.e. processes to control the operation of the machine characterised by the purpose or target of the control
    • A47L15/0021Regulation of operational steps within the washing processes, e.g. optimisation or improvement of operational steps depending from the detergent nature or from the condition of the crockery
    • AHUMAN NECESSITIES
    • A47FURNITURE; DOMESTIC ARTICLES OR APPLIANCES; COFFEE MILLS; SPICE MILLS; SUCTION CLEANERS IN GENERAL
    • A47LDOMESTIC WASHING OR CLEANING; SUCTION CLEANERS IN GENERAL
    • A47L15/00Washing or rinsing machines for crockery or tableware
    • A47L15/42Details
    • A47L15/4297Arrangements for detecting or measuring the condition of the washing water, e.g. turbidity
    • AHUMAN NECESSITIES
    • A47FURNITURE; DOMESTIC ARTICLES OR APPLIANCES; COFFEE MILLS; SPICE MILLS; SUCTION CLEANERS IN GENERAL
    • A47LDOMESTIC WASHING OR CLEANING; SUCTION CLEANERS IN GENERAL
    • A47L2401/00Automatic detection in controlling methods of washing or rinsing machines for crockery or tableware, e.g. information provided by sensors entered into controlling devices
    • A47L2401/10Water cloudiness or dirtiness, e.g. turbidity, foaming or level of bacteria
    • AHUMAN NECESSITIES
    • A47FURNITURE; DOMESTIC ARTICLES OR APPLIANCES; COFFEE MILLS; SPICE MILLS; SUCTION CLEANERS IN GENERAL
    • A47LDOMESTIC WASHING OR CLEANING; SUCTION CLEANERS IN GENERAL
    • A47L2401/00Automatic detection in controlling methods of washing or rinsing machines for crockery or tableware, e.g. information provided by sensors entered into controlling devices
    • A47L2401/12Water temperature
    • AHUMAN NECESSITIES
    • A47FURNITURE; DOMESTIC ARTICLES OR APPLIANCES; COFFEE MILLS; SPICE MILLS; SUCTION CLEANERS IN GENERAL
    • A47LDOMESTIC WASHING OR CLEANING; SUCTION CLEANERS IN GENERAL
    • A47L2401/00Automatic detection in controlling methods of washing or rinsing machines for crockery or tableware, e.g. information provided by sensors entered into controlling devices
    • A47L2401/20Time, e.g. elapsed operating time
    • AHUMAN NECESSITIES
    • A47FURNITURE; DOMESTIC ARTICLES OR APPLIANCES; COFFEE MILLS; SPICE MILLS; SUCTION CLEANERS IN GENERAL
    • A47LDOMESTIC WASHING OR CLEANING; SUCTION CLEANERS IN GENERAL
    • A47L2501/00Output in controlling method of washing or rinsing machines for crockery or tableware, i.e. quantities or components controlled, or actions performed by the controlling device executing the controlling method
    • A47L2501/30Regulation of machine operational steps within the washing process, e.g. performing an additional rinsing phase, shortening or stopping of the drying phase, washing at decreased noise operation conditions

Abstract

Method for operating a dishwasher with a central control unit with measurement of the turbidity of the washing liquid and determination of the program sequence depending on the turbidity of the washing liquid, the program beginning with a pre-wash program step, the turbidity being measured in the pre-wash program step and the gradient of the turbidity values being recorded the time period until the slope of the turbidity values is reached with the value zero and difference values are formed from the respective turbidity values, a degree of soiling of the washing liquid based on the amount of dirt or the solubility of the dishes being soiled being derived from the turbidity values, the difference values and the time period, and the progress of the washing program being determined and carried out in sub-program steps as a function of the determined amount of dirt and solubility of the dishes, characterized in that
that the rinsing process is started with a pre-rinse cycle in which these values of the turbidity measurement are separated when the lower and the upper spray levels are operated alternately or when the spray levels are operated together when the spray system is operated continuously as ...

Description

  • The invention relates to a method for operating a dishwasher with central control unit with measurement of the turbidity of the rinsing liquid and determination of the Program sequence depending from the cloudiness the rinsing liquid, whereby the program begins with a pre-rinse program step, where in the pre-wash program step cloudiness measured and the slope of the turbidity values is recorded, the length of time until the slope is reached the turbidity values is determined with the value zero and from the respective turbidity values Difference values are formed, the difference values from the turbidity values and the duration a degree of contamination of the rinsing liquid according to the amount of dirt or solubility the dishwashing pollution is derived and being dependent the determined amount of dirt and the solubility of the dishes the progress of the washing program is determined and carried out in sub-program steps.
  • Such a method is known from the DE 197 45 428 C2 known. In this known method there is probably a connection between the degree of soiling and the required rinsing time or temperature, but no details can be seen in the determination of the initial values for the rinsing process after the program steps have been defined in order to ensure adequate cleaning with optimized energy and water requirements to reach.
  • From the DE 196 29 806 A1 It is known to measure the foam load in the rinsing water and to set the temperature thereof in dependence on the measured turbidity value.
  • Again DE 36 26 351 C2 can be seen, the measurement of the turbidity can be carried out both in the area of the upper and the lower spray elements. It is also noted that there is a connection between the turbidity and the stability of the pressure.
  • The rinsing liquid can be heated up in a pre-test cycle like that DE 198 31 687 A1 shows. However, the preliminary test can also be carried out without heating the rinsing liquid, as is the case with DE 196 51 344 A1 is known.
  • From the DE 196 38 514 A1 it can be deduced that the cleaning time and / or the cleaning temperature can be regulated depending on the turbidity of the washing liquid and the solubility of the dishes. Foam detection can be carried out using a turbidity sensor.
  • A fuzzy set can be used in the control unit to link the input and output values, as in a method according to the DE 42 19 276 A1 ,
  • There was no lack of attempts a dishwasher to create, in which an incorrect operation by the user is completely excluded is, whereby the energy and water consumption is limited to the lowest possible level.
  • It is an object of the invention Process of the aforementioned Way of creating the washing program runs automatically with minimal energy and water requirements different dishes according to degree of soiling and solubility as well as any loading of the washing levels are taken into account and still excellent cleaning and drying of the dishes becomes.
  • This object is achieved according to the invention in that the rinsing process is started with a pre-rinse cycle in which these values of the turbidity measurement are sent separately as input variables to the control unit when the lower and upper spray levels are operated alternately or when the spray levels are operated together when the spray system is operated continuously that the control unit also determines the following as input variables:
    • a) the current temperature of the rinsing liquid and / or the inlet temperature of the fresh water and
    • b) the foam formation of the rinsing liquid,

    that the central control unit derives the following output values from these input variables:
    • c) a value of the turbidity of the rinsing liquid in%,
    • d) a value of the water pollution with particles in%,
    • e) a value for the solubility of the dishes in%,
    • f) a value for the required cleaning temperature in ° C and
    • g) a value for the required rinsing time,

    that, depending on these output values derived from the pre-rinse cycle, the number and parameters of the sub-program sections of the further program run are determined by the control unit and
    that a measure of the stability of the pressure of the circulation pump is derived from the measured values for the turbidity and the foaming of the rinsing liquid, depending on the water output
    • aa) small amounts of water are added,
    • ab) the amount of water is increased to a maximum value or
    • ac) a complete water change is made as well
    • ad) sub-program steps are repeated, and
    • ae) the sieve or drain shaft is rinsed before the next sub-program step.
  • In this embodiment of the process is the washing program completely to the actual dishwashing customized. The amount of water, the rinsing time and the rinsing temperatures are based on the measured and derived values for the dishes and water pollution and the washing program depending on it in terms of minimal energy and water requirements as well as optimal cleaning and Drying of the dishes and required sub-program steps automatically carried out. For the clear decisions of the program flow is the one with the measures achievable even pressure the circulation pump important.
  • It can already be provided that the pre-wash with or without heating the rinsing liquid is made, the heating of the degree and the solubility depending on the soiling of dishes is made.
  • With an alternating operation of the two washing levels the dishwasher One embodiment provides that the turbidity values of the lower and upper washing level a turbidity difference value is derived to make decisions about the progress of the washing program hold true.
  • With the specified process features a sure value for dishwashing pollution and its solubility. there becomes the water temperature of the rinsing liquid and the rinse time until the increase in turbidity the rinsing liquid reached the value reached zero, being at low water temperature and short rinsing time the solubility the solubility is easy and high water temperature and long rinsing time is difficult. These values are compared with limit values and dependent on of which the necessary further sub-program steps are defined.
  • From the turbidity of the rinsing liquid and the solubility the dishwashing dirt can be the required cleaning temperature and the cleaning duration in the following sub-program steps. On the one hand, it is provided that, depending on the turbidity, the rinse and the determined solubility the cleaning temperature for the dishwashing liquid is determined in the further sub-program steps, whereby at lower haze and easier solubility one low and high turbidity and difficult solubility a high cleaning temperature for the rinsing liquid chosen and on the other hand that with low turbidity the rinsing liquid and easy solubility the dishwashing a little and with high turbidity the rinse and difficult solubility a long cleaning time is selected for dishwashing.
  • The cleaning time and / or the The cleaning temperature is (are) preferably dependent from the cloudiness the rinsing liquid and of solubility of dishes between a minimum and a maximum value continuously regulated.
  • The control effort in the central control unit can be kept small in that in the central control unit a fuzzy set to derive the output values from the input values is used.
  • It is also provided that the fuzzy rules, i.e. the logical connection of the individual linguistic Terms with each other, in a freely programmable memory Control unit can be freely programmed to change the fuzzy set in the washing program the dishwasher adapt, then the program flow can easily adapt to new conditions be adjusted.
  • The program flow can also do this be adjusted that the access conditions of the fuzzy inputs and / or the output conditions of the fuzzy outputs or whose linguistic terms are changed.

Claims (10)

  1. Method for operating a dishwasher with a central control unit with measurement of the turbidity of the washing liquid and determination of the program sequence depending on the turbidity of the washing liquid, the program beginning with a pre-wash program step, the turbidity being measured in the pre-wash program step and the gradient of the turbidity values being recorded the time period until the slope of the turbidity values is reached with the value zero and difference values are formed from the respective turbidity values, a degree of soiling of the washing liquid based on the amount of dirt or the solubility of the dishes being soiled being derived from the turbidity values, the difference values and the time period, and depending on the determined amount of dirt and solubility of the dishes, the progress of the washing program is determined and carried out in sub-program steps, characterized in that the washing process with egg a pre-rinse cycle is started, in which these values of the turbidity measurement are sent separately as input variables to the control unit when the lower and the upper spray levels are operated alternately or when the spray levels are operated together, that the control unit also determines as input variables: a ) the current temperature of the rinsing liquid and / or the inlet temperature of the fresh water and b) the foam formation of the rinsing liquid, so that the following initial values are derived from these input variables by the central control unit: c) a value of the turbidity of the rinsing liquid in%, d) a value of the water load with particles in%, e) a value for the solubility of dishwashing in%, f) a value for the required cleaning temperature in ° C and g) a value for the required washing time that the control unit determines the number and parameters of the sub-program sections of the further program sequence depending on these initial values derived from the pre-wash cycle and that a measure of the stability of the pressure of the circulating pump is derived from the measured values for the turbidity and the foaming of the rinsing liquid, with aa) small amounts of water being added depending on the water output, ab) the amount of water being increased to a maximum value, or ac) a complete water change is made as well as ad ) Partial program steps are repeated, and ae) the sieve or drain shaft is rinsed before the next partial program step.
  2. A method according to claim 1, characterized in that the pre-wash with or without heating the rinsing liquid is made.
  3. A method according to claim 1 or 2, characterized in that that from the turbidity values the lower and upper spray levels a turbidity difference value is derived from the control unit with predetermined limit values is compared to decisions for the progress of the washing program hold true.
  4. Method according to one of claims 1 to 3, characterized in that that the value for the solubility of dishes from the water temperature of the washing liquid and the flushing time until the increase in turbidity the rinsing liquid has reached the value zero, being lower Water temperature and short rinsing time the solubility the solubility is easy and high water temperature and long rinsing time is difficult and that these values are compared with predetermined limit values and depending of which the necessary further sub-program steps are defined become.
  5. A method according to claim 4, characterized in that dependent on from the cloudiness the rinsing liquid and the determined solubility the cleaning temperature for the dishwashing liquid is determined in the further sub-program steps, whereby at low haze and easier solubility low and high turbidity and difficult solubility a high cleaning temperature for the rinsing liquid chosen becomes.
  6. A method according to claim 5, characterized in that with low turbidity the rinsing liquid and easier solubility the dishwashing a little and with high turbidity the rinse and difficult solubility a long cleaning time is selected for dishwashing.
  7. A method according to claim 6, characterized in that the cleaning time and / or the cleaning temperature is dependent from the cloudiness the rinsing liquid and solubility of dishes between a minimum and a maximum value is continuously regulated.
  8. Method according to one of claims 1 to 7, characterized in that that in the central control unit to derive the output values a fuzzy set is used from the input values.
  9. A method according to claim 8, characterized in that the fuzzy rules, i.e. the logical connection of the individual linguistic Terms with each other, in a freely programmable memory Control unit can be freely programmed to change the fuzzy set in the washing program of dishwasher adapt.
  10. A method according to claim 8, characterized in that the access conditions of the fuzzy inputs and / or the output conditions of the fuzzy outputs or their linguistic terms are changed to adapt the program flow.
DE10253017A 2002-11-14 2002-11-14 Method for operating a dishwasher with a central control unit Expired - Fee Related DE10253017B4 (en)

Priority Applications (1)

Application Number Priority Date Filing Date Title
DE10253017A DE10253017B4 (en) 2002-11-14 2002-11-14 Method for operating a dishwasher with a central control unit

Applications Claiming Priority (5)

Application Number Priority Date Filing Date Title
DE10253017A DE10253017B4 (en) 2002-11-14 2002-11-14 Method for operating a dishwasher with a central control unit
EP03025908A EP1438920B1 (en) 2002-11-14 2003-11-12 Method of operating a dishwasher with a central control unit
DE60311061T DE60311061T2 (en) 2002-11-14 2003-11-12 Method for operating a dishwasher with a central control unit
ES03025908T ES2278107T3 (en) 2002-11-14 2003-11-12 Method of operating a dishwasher through a central control unit.
US10/714,110 US7749328B2 (en) 2002-11-14 2003-11-14 Method of operating a dishwater with a central control unit

Publications (2)

Publication Number Publication Date
DE10253017A1 DE10253017A1 (en) 2004-06-03
DE10253017B4 true DE10253017B4 (en) 2004-09-09

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Family Applications (1)

Application Number Title Priority Date Filing Date
DE10253017A Expired - Fee Related DE10253017B4 (en) 2002-11-14 2002-11-14 Method for operating a dishwasher with a central control unit

Country Status (4)

Country Link
US (1) US7749328B2 (en)
EP (1) EP1438920B1 (en)
DE (1) DE10253017B4 (en)
ES (1) ES2278107T3 (en)

Cited By (1)

* Cited by examiner, † Cited by third party
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DE102010038087A1 (en) * 2010-10-11 2012-01-12 Miele & Cie. Kg Method for controlling washing programs of automatic dishwashers

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DE102005015157A1 (en) * 2005-04-02 2006-10-05 Premark Feg L.L.C., Wilmington Multitank-transportation dishwasher e.g. tape transportation dishwasher for washing goods, has liquid recirculation device transferring liquid of front cleaning area into rear cleaning area against feeding direction
KR20080050834A (en) * 2006-12-04 2008-06-10 삼성전자주식회사 Apparatus for controlling washing of a dish washing machine and method thereof
DE102007029502B3 (en) * 2007-06-25 2008-10-23 Miele & Cie. Kg Control for a dishwasher
US8506725B2 (en) * 2008-02-15 2013-08-13 Electrolux Home Products, Inc. Washing appliance and associated method
DE102008030537A1 (en) * 2008-06-27 2009-12-31 BSH Bosch und Siemens Hausgeräte GmbH Method for operating a water-conducting household appliance
DE102008044952A1 (en) * 2008-08-29 2010-03-04 Premark Feg L.L.C., Wilmington Dishwasher in the form of a programmer and method of operation thereof
TR200806744A2 (en) 2008-09-05 2010-03-22 Vestel Beyaz Eşya Sanayi̇ Ve Ti̇caret Anoni̇m Şi̇rketi̇@ load detection method for Dishwashers
KR101054435B1 (en) * 2008-11-10 2011-08-05 엘지전자 주식회사 How to control your dishwasher
DE102009031433A1 (en) * 2009-07-01 2011-01-05 Henkel Ag & Co. Kgaa Method for operating an automatic dishwasher
US9265398B2 (en) * 2010-03-08 2016-02-23 Whirlpool Corporation Dishwasher with separate sump for concentrated fluid supply
US8337631B2 (en) * 2010-03-08 2012-12-25 Whirlpool Corporation Dishwasher with separate sump for concentrated fluid supply
KR101645040B1 (en) 2010-03-31 2016-08-02 엘지전자 주식회사 A dishwasher and a control method the same
US20120037185A1 (en) * 2010-08-13 2012-02-16 Ecolab Usa Inc. Optimization of dish machine parameters

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DE3626351A1 (en) * 1986-08-04 1988-02-11 Licentia Gmbh Method for operating a dishwasher
DE4219276A1 (en) * 1992-06-12 1993-12-16 Licentia Gmbh Washing or dishwashing machine - has programme control and measurement device for degree of dirtiness of washing or rinsing water
DE19629806A1 (en) * 1996-07-24 1998-01-29 Aeg Hausgeraete Gmbh Washing machine etc. has turbidity sensor
DE19638514A1 (en) * 1996-09-20 1998-03-26 Aeg Hausgeraete Gmbh Washing machine etc. has turbidity sensor
DE19745428C2 (en) * 1996-10-22 2002-10-31 Honeywell Inc Method for washing an object in a container
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* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
DE102010038087A1 (en) * 2010-10-11 2012-01-12 Miele & Cie. Kg Method for controlling washing programs of automatic dishwashers

Also Published As

Publication number Publication date
EP1438920A2 (en) 2004-07-21
US20040118435A1 (en) 2004-06-24
DE10253017A1 (en) 2004-06-03
EP1438920A3 (en) 2005-06-29
EP1438920B1 (en) 2007-01-10
US7749328B2 (en) 2010-07-06
ES2278107T3 (en) 2007-08-01

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